Compound rail.



34/] TNESSES:

D. P. CRAWFORD.

COMPOUND RAIL. 7 APPLICATION FILED 13mm, 1912.

Patented June 2, 1914,

2 SHEETS-SHEET 1.

BY I

Z4 T TORNE Y D. F. CRAWFORD.

COMPOUND RAIL.

APPLICATION TILED D30. 30, 1912.

Patented June 2, 1914.

WI T NESSES:

Witt it DAVID F. CRAWFORD. OI" PITTSBURGH; PENNSYLVANIA.

COMPO'U'ND RAIL.

Application filed December 80, 1912.

To all whom it may cow/12');

Be it known that l, DAvm ll. Cniiviwian, 21 citizen oi the United States, residingat Pittsburgh, in the county of .i illegheny and State of Pennsylvania, have invented oer tainnew and. useful linprm'emcnts in Conipound Rails, of which the following is a specification.

The invention relates to compound or built-up rails wherein the composition of the upper and lower portions of the rails may be varied to suit conditions, the lower portion being preferably made of" tough low carbon steel, and the upper portion of harder steel having a higher carbon content and increased wearing qualities. The invention has for its primary objects the pro vision of e built-up rail in which the parts of the railare clamped together with a great degree of security; the provision of a rail. in which the arts may he rapidly assembled and disasseni 3196i to permit oi? quick-replacement of worn partsj and the provision of a compound rail section which con he used with the ordinary unitary rail section and in which adjoining sections of track may be properly secured together-in alinementi One embodiment of the invention shown in the accompanying drawings wherein Figure 1 is a cross section through h rail, on the line I- l in t, the clanipin means being shown in end elevation; is a section on. the line ti- UL oi Fig. in shows the splice bars in end elevation; Fig: 3 is 21 section through the rail at e point Where insulating means are employed tor insulatin the rail trons the ground; Fig. 4%; is a side e evstion of the rail structure on areduced scale; 5 is a section on the lines VV and V V of (3, the left hand side of 5 being: taken on the line V V, and the right hand side being :1 section taken on the line V V; and 6 is a side eievation of the, connecting piece employed where a compound rail oi the present application is joined to a rail oi ordinary cross section.

Referring to Figs. 1 and t, i is the head of the railwhich is made oi relatively hard or high carbon steel in order to resist Wear, and 2 is an 1 section of very tough lOW carbon steel, upon which there is sul'istantially no wear, and which is therefore of a'texture adapted to resist strains and entirely lacking the brittleness of extremely hard high carbon steel. The members 1 and 2 are of specification of Iietters Potent.

Potent ed June it Serial No. 739,218.

:ourse commercialrolled sections, and may be made of any desired proportions, the weight oi the two sections per unit ii l being somewhat greater than that of ti ordinary rail designed for the same service.

The two sections 1 and are held together by means of clamping members 3 and t placed along the sections at a iproprinte in tervals, depending upon conditious as intheater]. in Fig. i. Tihese clainpiiu'g nicnihers are held securely in place o niczins oi? the bolts 5, any suitable type ol nut loch being employed with the nuts oi the boils 'lh clamp l on one side oi he sections 1 and, is provided with a heel .l portion c at its upper edge. and lie-lotto, e ge u end the flange of the section 1 a lacy is i reused, such key 7 being angular in 'ross ,tlfl'fl as indicated in liig'. l, and heirs: of tially the some length as the clanii'iingr n her 4. I r

The purpose oi the he or 7 is to permit of the more reef theun 'ier section 1 for re pair, as by knocking out tion 1 'ran. be removed the nuts on the bolts the mil is sul ited. to the upper section it :2 mainteinince is obviously sinal case Where the entire section moved to renew the track.

Figure 2 illustrates the construction I ployed Where two rail. sections sect together at their ends. The chitin hers S and, fl employed to fasten i are quite siinilnc to the members 5; show in Fig. l, but are longer as int noted in. Fig. l and in order to git, additional strength, have their lianges extruded down around the flanges of the secthin "llhc central. port-ions oi the members and are also spaced away from the Web ot' the section instead of engaging the Web the section 2 the elf-ringing nuunbers in this spent followin the usual practice employ ployed Where it desired to insulate the rail. v in this construction the flanges oi the sections 1 and 2 are held together by moons of the U-shaped cl1ps-12,- and these incinit lic bers are secured by means of the screws shown in the blocks of wood 14 14. Metal plates 15 and 16 engage both sides of the wooden blocks 1414 and are clamped in position by means ot'the bolts 16. The plate 16 has a flange 18 extending beneath the section 2 and an insulating strip 19 is provided upon the inside surface of the plate 16 and flange 18. The bolt is also insulated by means of the collars 20 and the washers 21.

Figs. 5 and 6 illustrate the construction employed where the compound rail is sethe sections 1 and 2. The wings 26 are provi fdedwith the holes 27 adapted to receive bolts for clamping the wings tightly against the web of the sections 1 and 2; It

' will be noted that the wings 26 are providedwith flanges 28 by means of which the block may be spiked in place to the ties.

Having thus described my invention and illustrated its use, what I claim as new and flanges to the lower section, and clamping means for the other of said pair of flanges 7 comprising a clamp bolted to the lower section and having an overhanging portion above such other flange, and a key wedged between the said overhanging ortion and the said other flange of the trea section;

2. In combination in a compoundrail, a lower I section, an upper tread section ,resting on the top of the lower section and provided with a pair of flanges, -a pair of clamps on opposite sides of the rail with overhanging edges for securing the said flanges of the tread section, a key interposed between one of the said overhanging flanges and the opposing flange of the tread section,

and a bolt for securing the clamps against the sides of the lower section;

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

DAVID F. CRAWFORD.

Witnesses I E. A. Smmen'r, U. S. CAREY. 

